Zeolitic imidazolate framework materials: recent progress in synthesis and applications

Chen, Binling; Yang, Zhuxian; Zhu, Yanqiu; Xia, Yuguo

doi:10.1039/c4ta02984d

Cited by 832 publications

(534 citation statements)

References 226 publications

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“…It is noticeable for ZIF-8 that the agreement between experiment and calculation for Ω is poorer than for the other ZIFs, perhaps reflecting the dynamics of the -CH 3 group. More complex ZIFs can be synthesised using more than one type of linker, producing materials that not only have different pore shapes and sizes, but that can also have different chemical properties (e.g., hydrophobic or hydrophilic pores) [2,[4][5][6][7][8][9]. The 13 C CP MAS NMR spectra of ZIF-68, ZIF-70 and ZIF-78 are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…1a shows the structure of ZIF-65, which is synthesised with 2-nitroimidazolate as the linker, and exhibits the well-known sodalite (SOD) framework topology [3]. ZIFs have attracted considerable recent attention, owing to their potential applications in gas storage and separation, fluid separation, sensing, encapsulation and controlled delivery of drug molecules [2,[4][5][6][7][8][9]. The range of applications can be widened by using functionalised imidazolate linkers, altering the chemical nature of the pores produced, while maintaining the framework topology [10].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of zeolitic imidazolate frameworks using 13 C and 15 N solid-state NMR spectroscopy

Sneddon

Kahr

Orsi

et al. 2017

Solid State Nuclear Magnetic Resonance

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Zeolitic imidazolate frameworks (ZIFs) are a subclass of metal-organic frameworks (MOFs) with extended threedimensional networks of transition metal nodes (bridged by rigid imidazolate linkers), with potential applications in gas storage and separation, sensing and controlled delivery of drug molecules. Here, we investigate the use of 13 C and 15 N solid-state NMR spectroscopy to characterise the local structure and disorder in a variety of singleand dual-linker ZIFs. In most cases, a combination of a basic knowledge of chemical shifts typically observed in solution-state NMR spectroscopy and the use of dipolar dephasing NMR experiments to reveal information about quaternary carbon species are combined to enable spectral assignment. Accurate measurement of the anisotropic components of the chemical shift provided additional information to characterise the local environment and the possibility of trying to understand the relationships between NMR parameters and both local and long-range structure. First-principles calculations on some of the simpler, ordered ZIFs were possible, and provided support for the spectral assignments, while comparison of these model systems to more disordered ZIFs aided interpretation of the more complex spectra obtained. It is shown that 13 C and 15 N NMR are sufficiently sensitive to detect small changes in the local environment, e.g., functionalisation of the linker, crystallographic inequivalence and changes to the framework topology, while the relative proportion of each linker present can be obtained by comparing relative intensities of resonances corresponding to chemically-similar species in cross polarisation experiments with short contact times. Therefore, multinuclear NMR spectroscopy, and in particular the measurement of both isotropic and anisotropic parameters, offers a useful tool for the structural study of ordered and, in particular, disordered ZIFs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of zeolitic imidazolate frameworks using 13 C and 15 N solid-state NMR spectroscopy

Sneddon

Kahr

Orsi

et al. 2017

Solid State Nuclear Magnetic Resonance

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“…[199][200][201][202] When instead of the molecular graph G its line graph L(G) is used, then instead of the ordinary Randić index one arrives at Estrada's "edge connectivity index" [203][204][205] A comparison between Randić and edgeconnectivity indices of benzenoid hydrocarbons was reported. 206 In the case of Zagreb indices, the transformation G → L(G) yields the "reformulated Zagreb indices".…”

Section: Generalizations and Parametrizationsmentioning

confidence: 99%

Degree-Based Topological Indices

Gutman¹

2013

Croat. Chem. Acta

643

384

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“…[17,18] However, the components in these porous carbon-metal oxide composites usually cannot achieve homogeneous dispersion since they were frequently prepared by mechanical or physical mixing the metal oxides with the porous carbon materials. More recently, metal 4 organic frameworks (MOFs) (including Zeolitic Imidazolate Frameworks (ZIFs)), a new class of inorganic-organic crystalline nanoporous materials that assembled from metal ions coordinated to rigid organic ligands, [19,20] have emerged as promising precursors or sacrificial templates for the preparation of porous carbon based materials, [21,22] due to their tuneable structures, vast functionalities and fascinating properties. The preparation procedure is simple, and porous carbon-based materials can be produced by the direct carbonization of MOFs in an inert atmosphere, without any additional carbon precursors.…”

Section: Introductionmentioning

confidence: 99%

Atomically homogeneous dispersed ZnO/N-doped nanoporous carbon composites with enhanced CO2 uptake capacities and high efficient organic pollutants removal from water

Chen

Kong

et al. 2015

Carbon

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Advanced functional composite of ZnO nanoparticles embedded in N-doped nanoporous carbons has been synthesized by a simple one-step carbonization of zeolitic imidazolate framework-8 under a water stream atmosphere. A variety of characterization techniques show that the introduction of water steam during the carbonization process holds the key to obtain the fine and homogeneously dispersed ZnO nanoparticles within the functionalised nanoporous carbon matrix. Possessing a higher specific surface area, a larger pore volume and abundant oxygen-containing hydrophilic functional groups, the resulting composite exhibits a stronger interaction with CO 2 and is more efficient to promote the photocatalytic degradation-adsorption of methylene blue under visible light than the composite obtained without steam treatment. As a result, the steam derived composite exhibits increased CO 2 uptake capacity and excellent methylene blue molecules removal from water. Using different metal-organic frameworks as precursors, this new, simple and green method can be further expanded to generate various new homogeneous dispersed functional metal oxide/porous carbon composites with high efficient in relevant applications.

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Zeolitic imidazolate framework materials: recent progress in synthesis and applications

Abstract: Recent progress in the synthesis and applications of zeolitic imidazolate framework materials is presented in this review.

Cited by 832 publications

References 226 publications

Investigation of zeolitic imidazolate frameworks using 13 C and 15 N solid-state NMR spectroscopy

Investigation of zeolitic imidazolate frameworks using 13 C and 15 N solid-state NMR spectroscopy

Degree-Based Topological Indices

Atomically homogeneous dispersed ZnO/N-doped nanoporous carbon composites with enhanced CO2 uptake capacities and high efficient organic pollutants removal from water

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